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Backlight device and liquid crystal display device

a liquid crystal display and backlight technology, applied in waveguides, lighting and heating apparatuses, instruments, etc., can solve the problems of color fluctuation, uneven color, and difficulty in color mixing, and achieve the effect of suppressing uneven color and suppressing uneven color

Inactive Publication Date: 2009-05-26
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the backlight device formed of plural LED packages having such configuration and arranged in one row, color fluctuation is likely to occur on the light guide plate.
As a result, in the light guide plate, at one side of the LED array direction, the rate of blue light is higher, thus making color mixing difficult, and uneven color is likely to occur.
Similarly, in the light guide plate, at the other side of the LED array direction, the rate of red light is higher, thus making color mixing difficult, and uneven color is likely to occur.

Method used

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  • Backlight device and liquid crystal display device
  • Backlight device and liquid crystal display device
  • Backlight device and liquid crystal display device

Examples

Experimental program
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Embodiment Construction

[0038]A backlight device according to a first embodiment of the invention is described while referring to FIGS. 1 to 10. FIG. 1 is a partially exploded perspective view of a portable Digital Versatile Disc (DVD) player 10 provided with a backlight device 20 of the embodiment. The portable DVD player 10 is an example of an electronic appliance provided with the backlight device 20. The backlight device 20 may be also used in other electronic appliances such as portable telephone.

[0039]As shown in FIG. 1, the portable DVD player 10 includes a main body 11, and a liquid crystal display device 12. The main body 11 accommodates a disc not shown. The liquid crystal display device 12 is attached to the main body 11, and is designed to display images.

[0040]FIG. 1 shows a disassembled state of the liquid crystal display device 12. The liquid crystal display device 12 includes a first housing 13, a liquid crystal panel 14, and the backlight device 20. The liquid crystal panel 14 and the backl...

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PUM

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Abstract

The backlight device includes a plurality of packages, and a light guide plate. The package includes a housing for package, and a plurality of light sources. The housing for package includes a tubular part having a wall surrounding the circumference, a bottom wall provided at one end of the tubular part, and a passing part provided at the other end of the tubular part for passing the light from inside to outside of the tubular part. The plurality of light sources are contained in the housing for package and disposed in the bottom wall, and emit light. The plurality of packages are arrayed in one direction. At least part of the layout of light sources relative to the incident plane is different from mutually adjacent packages.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is based upon and claims the benefit of priority from prior Japanese Patent Applications No. 2007-000199, filed Jan. 4, 2007; and No. 2007-327655, filed Dec. 19, 2007, the entire contents of both of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a sidelight type backlight device used in, for example, a liquid crystal display or other liquid crystal display devices. The invention also relates to a liquid crystal display device provided with a backlight device.[0004]2. Description of the Related Art[0005]Conventionally, in a display for electronic appliances such as a portable computer, for example, a liquid crystal display is used in consideration of portable use. The liquid crystal display is composed of a liquid crystal panel, which is a non-luminous display device. Accordingly, the liquid crystal display device has a backlight d...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): F21V7/04
CPCG02B6/0028G02B6/0068G02F1/133615G02B6/0073G02F1/133603Y10S385/901
Inventor OKADA, NAOTADAKITAGAWA, TOSHITAKE
Owner KK TOSHIBA